NLDAS Secondary Forcing Data L4 Hourly 0.125 x 0.125 degree

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Hydrological Sciences Laboratory at NASA/Goddard Space Flight Center (GSFC/HSL)

Publication_Date: 08.01.2009

Title: NLDAS Secondary Forcing Data L4 Hourly 0.125 x 0.125 degree

Edition: 002

Geospatial_Data_Presentation_Form:

Series_Information:

Series_Name:

Issue_Identification:

Publication_Information:

Publication_Place: Greenbelt, Maryland, USA

Publisher: Goddard Earth Sciences Data and Information Services Center (GES DISC)

Other_Citation_Details:

Online_Linkage: http://disc.sci.gsfc.nasa.gov/hydrology/index.shtml

Description:

Abstract:

This data set contains the secondary forcing data "File B" for Phase 2 of the North American Land Data Assimilation System (NLDAS-2). The data are in 1/8th degree grid spacing and range from Jan 1979 to the present. The temporal resolution is hourly. The file format is WMO GRIB-1. Details about the generation of the NLDAS-2 forcing datasets can be found in Xia et al. (2012). The non-precipitation land surface forcing fields for NLDAS-2 are derived from the analysis fields of the NCEP North American Regional Reanalysis (NARR). NARR analysis fields are 32-km spatial resolution and 3-hourly temporal frequency. Those NARR fields that are utilized to generate NLDAS-2 forcing fields are spatially interpolated to the finer resolution of the NLDAS 1/8th-degree grid and then temporally disaggregated to the NLDAS hourly frequency. NLDAS-2 is providing a second forcing file, "File B", in which the surface temperature, humidity, and wind fields are represented not at 2-meters and 10-meters above the height of the NLDAS terrain, but rather at the same height above the NLDAS terrain as the height above the NARR terrain of the lowest prognostic level of the NARR assimilation system (namely, the same height above the model terrain as the lowest prognostic level of the mesoscale Eta model, which is the assimilating model in NARR). The surface downward surface radiation field in "File B" is taken directly from NARR, without any bias correction. The precipitation and convective precipitation fields in "File B" are also taken directly from NARR, and are used to calculate the convective fraction provided in "File A". The aerodynamic conductance is "File B" is also taken from NARR. The hourly land surface forcing fields for NLDAS-2 are grouped into two GRIB files, "File A" and "File B". "File B" is the secondary (optional) forcing file and contains ten fields. The data set applies a user-defined parameter table to indicate the contents and parameter number. The following table shows a list of parameters, their Product Definition Section (PDS) IDs and units. PDS_IDs:Short_Name:Full_Name [Unit] 179:ACONDsfc:Aerodynamic conductance [m/s] 63:ACPCPsfc:Convective precipitation hourly total [kg/m^2] 61:APCPsfc:Precipitation hourly total [kg/m^2] 204:DSWRFsfc:Shortwave radiation flux downwards (surface) [W/m^2] 7:HGThbl:NARR hybrid level Geopotential height [gpm] 1:PREShbl:NARR hybrid level Pressure [Pa] 51:SPFHhbl:NARR hybrid level Specific humidity [kg/kg] 11:TMPhbl:NARR hybrid level Temperature [K] 33:UGRDhbl:NARR hybrid level Zonal wind speed [m/s] 34:VGRDhbl:NARR hybrid level Meridional wind speed [m/s] WGRIB or other GRIB reader is required to read the files. For more information, please see: http://ldas.gsfc.nasa.gov/faq/#Tools

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Xia, Y., K. Mitchell, M. Ek, J. Sheffield, B. Cosgrove, E. Wood, L. Luo, C. Alonge, H. Wei, J. Meng, B. Livneh, D. Lettenmaier, V. Koren, Q. Duan, K. Mo, Y. Fan, and D. Mocko, (2012), Continental-scale water and energy flux analysis and validation for the North American Land Data Assimilation System project phase 2 (NLDAS-2): 1. Intercomparison and application of model products, J. Geophys. Res., 117, D03109, doi:10.1029/2011JD016048.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19790101

Ending_Date: Unknown

Currentness_Reference:Unknown

Status:

Progress: In Work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -125.0

East_Bounding_Coordinate: -67.0

North_Bounding_Coordinate: 53.0

South_Bounding_Coordinate: 25.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: PROJECT

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SURFACE PRESSURE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE AIR TEMPERATURE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > RAIN

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SHORTWAVE RADIATION

Theme_Keyword: EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM

Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM

Theme_Keyword: NLDAS > NORTH AMERICAN LAND DATA ASSIMILATION SYSTEM

Theme_Keyword: CWIC > CEOS WGISS INTEGRATED CATALOG

Theme_Keyword: Hydrology

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GREAT LAKES

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALABAMA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ARIZONA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ARKANSAS

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > COLORADO

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CONNECTICUT

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > DELAWARE

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > DISTRICT OF COLUMBIA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GEORGIA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > IDAHO

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ILLINOIS

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > INDIANA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > IOWA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > KANSAS

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > KENTUCKY

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MAINE

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MARYLAND

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MASSACHUSETTS

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MICHIGAN

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MINNESOTA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MISSISSIPPI

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MISSOURI

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MONTANA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEBRASKA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEVADA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW HAMPSHIRE

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW JERSEY

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW MEXICO

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW YORK

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NORTH CAROLINA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NORTH DAKOTA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > OHIO

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > OKLAHOMA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > OREGON

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > PENNSYLVANIA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > RHODE ISLAND

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > SOUTH CAROLINA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > SOUTH DAKOTA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TENNESSEE

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > UTAH

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > VERMONT

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > VIRGINIA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WASHINGTON

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WEST VIRGINIA

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WISCONSIN

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WYOMING

Temporal:

Temporal_Keyword_Thesaurus: GCMD

Temporal_Keyword: Hr

Temporal_Keyword: Hourly - < Daily

Access_Constraints: None

Use_Constraints:

None

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GES DISC HELP DESK SUPPORT GROUP

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Goddard Earth Sciences Data and Information Services Center

Address: Code 610.2

Address: NASA Goddard Space Flight Center

City: Greenbelt

State_or_Province: MD

Postal_Code: 20771

Country: USA

Contact_Voice_Telephone: 301-614-5224

Contact_Facsimile_Telephone: 301-614-5268

Contact_Electronic_Mail_Address: gsfc-help-disc@lists.nasa.gov

Browse_Graphic:

Browse_Graphic_File_Name: http://hydro1.sci.gsfc.nasa.gov/data/browse/NLDAS/NLDAS_FORB0125_H.002/2007/NLDAS_FORB0125_H.002_tmphblhlev1.A20070701.1800.gif

Browse_Graphic_File_Description:

NLDAS-2 Secondary Forcing hourly 0.125 degree \ NARR hybrid level 1 Temperature at 18Z on July 01, 2007 [k]

Browse_Graphic_File_Type: GIF

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The data are provisional and subject to change as model improvements are implemented and new input data sets become available.

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.125 degree

Longitude_Resolution: 0.125 degree

Geographic_Coordinate_Units: Decimal degrees

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NASA/GSFC/SED/ESD/GCDC/GESDISC > Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Contact_Person: GES DISC HELP DESK SUPPORT GROUP

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Goddard Earth Sciences Data and Information Services Center

Address: Code 610.2

Address: NASA Goddard Space Flight Center

City: Greenbelt

State_or_Province: MD

Postal_Code: 20771

Country: USA

Contact_Voice_Telephone: 301-614-5224

Contact_Facsimile_Telephone: 301-614-5268

Contact_Electronic_Mail_Address: gsfc-help-disc@lists.nasa.gov

Resource_Description: GES_DISC_NLDAS_FORB0125_H_V002

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: GRIB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://disc.gsfc.nasa.gov/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://disc.gsfc.nasa.gov/hydrology/data-holdings

Access_Instructions:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://ldas.gsfc.nasa.gov/nldas/

Access_Instructions:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://ldas.gsfc.nasa.gov/nldas/NLDAS2forcing.php

Access_Instructions:

NLDAS-2 Forcing Dataset Information

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://hydro1.sci.gsfc.nasa.gov/data/s4pa/NLDAS/RE...

Access_Instructions:

README document for NLDAS Phase 2 data sets.

Fees: No Fee

Metadata_Reference_Information:

Metadata_Date: 20090603

Metadata_Review_Date: 20121101

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GCMD User Support Office

Contact_Organization: NASA Global Change Master Directory

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Not Available

City: Lanham

State_or_Province: MD

Postal_Code: 20706

Country: USA

Contact_Voice_Telephone: Not Available

Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time